Things unfortunately getting heated up in Room 101 (7)
I believe the answer is:
icecaps
'things unfortunately getting heated' is the definition.
I can't judge whether this definition defines the answer.
'up in room 101' is the wordplay.
'up' shows that the letters should be reversed in order (in down clue: letters go upwards).
'in room' becomes 'space' (I've seen this before. I am not sure about the 'in' bit.).
's0s' becomes 'CI' (roman numerals).
'space'+'ci'='spaceci'
'spaceci' written backwards gives 'ICECAPS'.
Can you help me to learn more?
(Other definitions for icecaps that I've seen before include "Cold headgear, perhaps?" , "objects being eliminated from the world" , "Glacial areas" , "Areas of permanent glaciation" , "White sheets" .)